I'm experiencing cramping, nausea and bloating 20 days after my period, i had sex on day 15 and 19. could i be pregnant or is this likely just pms?

Maybe pregnancy?: For many women, the only sign of a pregnancy is a missed period and a positive home pregnancy test. Others may experience breast tenderness, fatigue, and nausea. It is also common to feel some pelvic fullness, mild cramping, and urinary urgency. A lot of women have no symptoms until about 6 weeks. A home pregnancy test should be positive approximately 12-14 days after conception. Good luck!